Quantum Dot Layer Between Dual LCD Panels to Suppress Moiré
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Solution Overview
Problem
Moiré patterns caused by the interference of regularly arranged pixel arrays in liquid crystal display devices affect the display quality, particularly in double-layer structures.
Innovation Solution
A quantum dot layer is disposed between the two display medium layers of the display device, which has light diffusing properties to reduce interference effects and alleviate moiré patterns, thereby improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two liquid crystal panels with regularly arranged pixel arrays are stacked to form a double-layer structure, then the display device can meet different display requirements and achieve enhanced display effects, but moiré patterns are easily formed by interference phenomenon which affects the quality of the display device
Solution Approach 1:
A quantum dot layer is introduced as an intermediary component between the two liquid crystal panels. This quantum dot layer contains quantum dot particles that can be excited by ultraviolet light to emit visible light, and it serves as a mediator that breaks the direct interference pattern between the two pixel arrays while enabling color conversion and enhancement, thus resolving the moiré pattern issue while maintaining the double-layer structure's display advantages
Solution Approach 2:
The patent changes the optical parameters of the system by introducing a quantum dot layer with specific optical properties. The quantum dot particles have size-dependent emission wavelengths, allowing control over the emitted light spectrum. This parameter change enables the system to convert ultraviolet light to visible light in specific color ranges, improving display quality while eliminating moiré patterns
2Object-affected harmful factors
If a quantum dot layer is disposed between two display medium layers to reduce interference effects and alleviate moiré patterns, then the visibility of moiré patterns is reduced and display quality is improved, but the device structure becomes more complex
Solution Approach 1:
The patent combines multiple functions into the quantum dot layer: it serves as a light conversion layer (converting UV to visible light), a color enhancement layer (providing specific color emission based on quantum dot size), and a moiré pattern suppression layer (breaking the interference pattern). By merging these functions into a single layer, the structure complexity is minimized while achieving multiple benefits
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The quantum dot layer effectively reduces the visibility of moiré patterns and enhances the display quality by diffusing light and regulating the light intensity, allowing for high-contrast, three-dimensional, and multi-field-of-view picture displaying.
Implementation Method 1
The quantum dot layer has multiple first quantum dot particles, multiple second quantum dot particles and multiple diffusing particles dispersed therein
Implementation Method 2
the quantum dot layer disposed between the two display medium layers has a light diffusing function, so that an interference effect caused by stacking of the two pixel array layers with one above the other may be reduced
Data Source
AI summary
A display device includes a first display panel, a second display panel, a quantum dot layer and a backlight module. The first display panel includes a first substrate, a second substrate, and a first display medium layer disposed between the second substrate and the first substrate. The second display panel includes a third substrate, a fourth substrate and a second display medium layer disposed between the third substrate and the fourth substrate. The quantum dot layer is disposed between the second substrate and the fourth substrate, and the quantum dot layer has multiple first quantum dot particles, multiple second quantum dot particles and multiple diffusing particles dispersed therein. The backlight module is located at a side of the second display panel.